Extra Statistics Practice for the SAT

The normal curve is symmetrical about the mean.

• True
• False

This data is normally distributed. What percent of the data is in the shaded region?

• 50%

• 68%

• 95%

• 99.7%

This data is normally distributed. What percent of the data is in the shaded regions?

• 5%

• 95%

• 2.5%

• 50%

This data is normally distributed. What percent of the data is in the shaded region?

• 68%

• 32%

• 16%

• 50%

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 95%
• 99.7%
• 50%

If I tell you that you scored at the 55th percentile on your final exam, you would know:

• 55% of the class scored the same or worse than you did

• You earned a 55% on the exam

• You failed the exam

• 45% of the class scored worse than you did

What percentage of data falls within 1 standard deviation? 

• 25%

• 68%

• 95%

• 99.7%

How much of the data falls within 3 standard deviations? 

• 25%

• 68%

• 95%

• 99.7%

What is the the total area under the standard normal distribution curve?

• 100
• 25
• .5
• 1

1.  Which best describes the shaded part of this normal distribution graph?  

• All data that is one or higher.
• All data that is one or more standard deviations above the mean.
• All data that is between 1 and 3.
• All data that is above the mean.